Tree injector



FIG. 1 is a front top and left side perspective view of a tree injector showing my new design;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom plan view thereof. 

The ornamental design for a tree injector, substantially as shown. 